How to – Fix “WARNING[2204]: acl.c:890 resolve_first: Unable to lookup ‘SERVER_EXTERNAL_IP'”

This error is the newer SVN versions and technically, won’t cause any issues, however here is the fix for it. Type the following command in your Linux Command Line:

sudo sed -i 's/SERVER_EXTERNAL_IP/0.0.0.0/' /etc/asterisk/pjsip.conf

That’s all there is to it.

Chris aka carpenox